Grooving-machine



F. M. FURBER.

GROOVlNG MACHINE.

APPLICATION FILED mums, 1919.

1,335,049. Patented Mar. 30,1920.

2 SHEETS-SHEET 1- F. M. FURBER.

GROOVING MACHINE.

AFPLICATION FILED JULYI6, 1919.

1,335,049- Patented Mar. 30,1920.

67 2 SHEETS-SHEET 2.

Cir

lllllhll) STATl-ll onr icn FREDERICK M. FURBER, OF REVERE, M1 SEALCHIUEEETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF. "i ji'llilltfiifllil', NEW" JERSEY, A. CORPORATION OF NEW JERSEY.

GROOVING-MAGHINE.

Specification of Letters Fatent.

Patented Ma1u30, 1920.

Application filed July 16, 1919. 1 Serial No. 311,217.

To all to hom it may concern Be it known that I, Fnnnnnicn M. FURBER, a citizen 0i the United States, residing at Revere, in the county of Suii'olk and State of Massachusetts, have invented certain Improvements in ti-roovinghlachines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters "on the drawings indicating like parts in the several figures.

This invention relates to cutting inachines and is herein illustrated as embodied in a machine adapted to cut a groove in a piece of flexible material such as leather.

In the manufacture of various leather articles such as trunks and bags,,pistol holsters, parts of harnesses, etc, which are bent or folded in places, it is desirable to cut a groove in the article along the line about which the bend or told is to be made, the purpose being to facilitate the bending or folding and to improve the appearance of the finished bend or iold. For example, a pistol holster commonly has a flap which is bent over the butt of the pistol and but toned to the main portion of the holster; and in order to facilitate the bending oi this flap a groove is cut on the inside of the holster along the line of the bond.

The general object of: the present invention is to provide a machine for performing these and similar operations. In the illustrative machine the work is held during the grooving operation by being gripped on both sides of the locality, in whichthe groove is to be cut, between the bed and a stationary presser or work engaging member which extends over the bed and toward which the bed is moved, a cutter-carriage being mounted for reciprocation on the presser. And in order to facilitate presentation of the work in proper position, a plurality of adjustable gages are mounted on the bed. With such a construction pieces of comparatively flexible leather may be sc cu rely held and accurately grooved. v

These and other teatures o? the invention, including certain details oil: construe tion and combinations of parts will be described as embodiedin an illustrative machine and pointed out in the appended claims.

Referring now drawing,

to the acconi ianying Figure 1 is a side elevation of a machine in which the present invention is embodied;

Fig. 2 is a transverse section on the line of Fig. 1, and

Fig. 3 is a plan of a portion of the ma chine showing a piece of work in position to be operated upon.

The illustrative machine is in many re spects similar to that shown in Patent No. 1,22 .1,918, granted May 8, 1917, upon an application filed in my name, and those parts which areidentical or similar in the two machines will first be described. Resting upon springs 5 and held in adjusted vertical position in opposition to the force oi? the springs by cap screws (not shown) a support 7 having projecting from its sides a series of rolls 9. The work-support, bed or table 13 has two downwardly extending flanges provided with inclined slots 15 to receive the rolls 9 so that when the bed is moved longitudinally it will be raised or lowered according to whether the move ment is in one direction or the other. The bed is normally held, when the machine is at rest, in the lowered position shown by a spring 17 coiled about a rod 19. This rod, which is fast at one end to the frame of the machine, passes through an eye 21 attached to the under side oi the bed and has a stop-nut 23 threaded on its other end,

In order that the bed may be moved to the right and thereby raised at the proper time, said bed carries a roll 25 with which an actuating member 27 is adapted to contact when a segmental plate 29 is rotated. At its rear end the actuating member is slotted, as indicated, and is held in adjusted position on the segmental plate by a pin 31. The segmental plate is rotated from a power shaft 33 by a one-revolution clutch which may be of any approved type. The cutter-carriage 35, which is somewhat dit- 'l.erent from that oil the patented machine, as will presently appear, is reciprocatcd by a connecting rod 37 which is pivoted at one end at 39 to the carriage and the other end upon a hollow stud adapted to be clamped by means of the headed pin 51 and a nut 41 to the segmental plate 9/9, the head oi the pin being received in an undercut groove 43 in said plate. The groove 43 struck about the axis of rotation oi the plate 29 as a center, and consequently the carriage 35 is always rcciprocated in a path fixed extent, although the points at which the movement begins and ends may be'varied by adjusting the upper end of the connecting rod 37with respect to the plate The parts which have been briefly described above, with the exception of the carriage 35, are or may be substantially like 7 the corresponding parts of the patented machine, 'and for details of their construction reference is made to the patent. It will be understood that when the cable is given a downward pull by a treadle (not shown) the segmental plate 29 makes one revolution about its substantially vertical axis of revolution and comes to rest in the position 7 shown, and that during the revolution, the

actuating member 27 strikes the roll 25, moves it to the right to raise the bed 13, holds it in raised position during the forward movement of'the carriage 35 and then runs off the roll 25 to permit the spring 17 to lower the bed 'into the position shown.

The patented machine is designed to slit theheelend of a sole 'to produce a thin tongue which may be bent down and atwhich extends over the bed 13 is slotted as shown to receive the cutter holder 53 and is provided with a flat :under face having teeth 55 against which the work may be pressed by the bed to clamp the work during the cutting operation. The cutter holder 53 is slotted at its upper end at 57 and is adjustably fastened to the carriage by a cap screw 59 which passes through the slot in the holder and is threaded into the carriage. The lower end of the cutter holder has asegmental socket to receive a segmental grooving cutter 61 and is split'to make the walls of the socket yieldablc, a pinchscrew 63 being provided to hold the cutter firmly in position. The cutter and its holder may be adjusted up and down'after Y the cap screw 59 has been loosened; and the cutter may be adjusted forward and back in its socket after the pinch-screw 63 has been loosened. I

In order to locate the work properly upon the bed, two gages 65 are provided, each gage having slotted tails through which pass-screws 67 by which the gages are adjustably fastened to the bed. When a holster blank, such as that indicated at is to be grooved, one gage is adjusted so as to bereceived in a reentrant curve of the edge near the middle of the blank and the'other to contact with the edge near one end of the blank.

With the parts in the position shown, a piece of work, such as a pistol holster blank, is placed on the bed 13 in a position determined'by the gages 65. The treadle (not shown) is then depressed to exert a pull on the cable t5 and thereby trip the one-revolution clutch to cause the segmental plate 29 to make one revolution. This moves the cutter-carriage 35 once forward and backward over the bed. During its forward movement and before the cutter reaches the work, the actuating member 27 strikes the roll 25 and moves the bed forward, thereby raising it and clamping the work between it and the toothed under face of the presser 51. It will be noted by referring to Fig. that the lower edge of the cutter 61 extends below the lower face of the member 51 so that when the work has been clamped against said lower face the forwardly mov ing cutter cuts a groove in the work. Th bed is held in its raised position until the carriage 35 has reached the end of its for ward stroke, after which the member 27 runs off from the roll 25 and the spring 17 returns the bed to the position shown, and presently the carriage returns to its rearward position and comes to rest.

Having thus described my invention,- what I claim is new and desire to secure by Letters Patent of the United States is:

1. A machine of the class described having, in combination, a bed for supporting a piece of stock, a stationary work engaging member located adjacent to the bed, a cutter carriage movable across the bed, a. cutter mounted on the carriage, means for moving the bed toward the stationary member to hold the work against said member, and means for imparting lOClplOCfltlOll to the cutter carriage.

2. A machine for grooving a piece of stock having, in combination, a bed for supporting thestock, a stationary member located adjacent to the bed, a carriage slidable on the stationary member, a grooving cutter mounted on the carriage, and means for moving the bed toward the stationary member to clamp the stock between it and the stationary member and for moving the carriage to cause the cutter to groove the stock.

3. A machine of the class described having, in combination, a bed for supporting a piece of stock, a cutter carriage, a cutter mounted thereon, a guide upon which the cutter-carriage is slidable, said guide extending over the bed and having a face between which and the bed the stock may be clamped, and power operated means acting first to clamp the stock between the guide and bed and then to cause the stock to be traversed by the cutter.

4.-. A machine of the class described havllif) ing, in combination, a bed for supporting a piece of stock, a cutter carriage, a cutter mounted thereon, a guide upon which the cutter-carriage is slidable, said guide extending over the bed and having a face be tween which and the bed the stock may he clamped, and power operated means acting first to raise the bed to clamp the stock between it and the guide and then to cause the stock to be traversed by the cutter.

5. A machine of the class described having, in combination, a bed for supporting a piece of stock, a cutter carriage, a cutter mounted thereon, a guide upon which the mitter-carriage is slidably mounted, said guide extending over the bed and having a work engaging face opposed to that of the bed, a driving shaft, and means connected therewith for raising the bed to clamp the stock and for reciprocating the carriage over the bed. i

6. A machineof the class described hav ing, in combination, a bed for supporting a piece of stock, a cutter carriage, a guide upon which the cutter carriage is slidably mounted, said guide extending over the bed, having a work engaging face opposed to that of the bed, and being provided with a longitudinal slot, a cutter holder fastened to the carriage and extending into the slot, a cutter fastened to the holder, means for reciprocating the carriage, and means for raising and lowering the bed, said lastnamed means being constructed and ar ranged to effect the raising of the bed before the cutter reaches the stock and to effect the lowering of the bed after the forward half of the reciprocation of? the carriage has been completed.

7. A machine of the class described having, in combination, a bed for supporting a piece of stock, a yielding support for the bed, connections between the bed and its support such that relative longitudinal movement between the bed and its support raises the bed, means for holding the bed normally in lowered position, a stationary presser extending over the bed, a cutter reciprocable over the bed, and means for pro ducing relative movement between the bed and its support to cause the stock to be pressed against the clamping member and for producing relative movement between the cutter and bed to cause the stock to be traversed by the cutter.

S. r machine for cutting a groove in a pistol holster blank having, in combination, a substantially flat bed for supporting the blank, a rigid stationary presser extending over the bed, a plurality of edge gages one of which is located to engage a reentraut curve in the edge of the blank, a cutter carriage guide extending over the bed and having a blank engaging face, a cutter carriage mounted on the guide, a grooving cutter mounted on the carriage, and power operated means for moving the cutter carriage along the guide toward the blank and for raising the bed to force the blank against the blank engaging face of the guide to hold it during the grooving operation.

In testimony whereof I have signed my name to this specification.

FREDERICK M. FUR-BER. 

